Fuse for projectiles



'Au 2 1927. g f y. scHLl-ER FUSE FOR PROJECT-ILES Filed Nov. 19,' 1924 VALENTIN scHRlA'rER, or soMMERDA, GERMANY, AssIGNoR ToRHErNrscHE vMETALL- WAAREN- UND MASCHINENEARRIK, oF DUssELDoRr-nERENDoRE, GERMANY, A

Y CORPORATION or GERMANY."

FUSE FOR IPROJECTILES. I

VApplication led November'19,'1924, Serial No. 750,894, and in lGrernfiany December 1, 1923.

In` Vfuses for projectiles for firing at aircraft at great heights, kthe arrangement has already been proposed by which the infiaminable material of the composition ring is not in connection with the external air by radially and externally directed borings or passages, since in consequence 'of the great speed of rotation in conjunction with the greatly diminished density of' the air in the4 upper strata of the atmosphere, the introduction of the oxygen necessary for the combustion of the powder is decreased and is so reduced that combustion of the material of the ring is delayed and the flame may even be extinguished. Instead of lateral o eninffs n.. f h

for introducing air to the composition rings, a longitudinal passage has been provided which leads into a conical shaped space open in front.- The air in the hollow space and the passage leading there-from to the composition is compressed in consequence of the high-forward velocity. The initial ignition device was protected on that account within the hollow cap shaped discharge space for thev fuse gases by a cap completely closing it in the usual manner against external influences. Y

Air must, however, be allowed to enter at the point of the fuse at the beginning of the flight of the projectile. The 4entrance of foreign bodies, of dust, moisture and thelike to the composition rings must, howevergbe prevented during the mounting and while 'protected before actual use, inorder to prevent the passages for introducing the airv from being choked and -to prevent any change of the particles of the ignition composition. lf the front opening of the fuse body was closed for this purpose, this closing device must be removed before using the projectile; this might be forgotten, in any case was troublesome, and in fact and for that reason such a closing device has not up tothe present time been in use.

The invention provides such device, but

ensures that no special manipulation is required, in order that at the moment of firing air should be introduced into the interior of the fuse. A thm small plate 1s secured 1n known manner at the circular opening of the fuse, as has previously been known 'in fuses with plungers, but in this latter case it serves a different purpose and must be intact during the flight of the projectile in Vorder to keep oif the air pressure-from theV plunger, and only at the moment of impact of the projectile, and by means of this is destroyed. The invention consists, therefore, in' theremployment of a small closing'plate for the front opening by which airis intro'- duced into the fuse, which is independent 4of the necessary covering ofthe ignition device-v by a protecting cap, and in the automatic disruption ofy this plateatthe momentY ofring the projectile and inthe means for accomplishing this.

The, accompanying drawing represents two embodiments of the-` invention.

In Fig. l the closing cap surrounding the plunger a has several lateral or laterally inclined passages c which connect the'inte'- rior ofivt-hecap .with the hollow space 0l surrounding the cap, kfrom which space a the sensitive portion of the fuse. The plunger ais provided with arlongitudinal" boring /L eXtend-mgas far as thefdetonator z'.

As soon as the fuse ispenetrated, thatis, when on firing-- the plunger -pierces y the primer,gas is generated from the composi tion in the detonator z', the combustion gases pass throughthe boring L' of the plunger low space l and their pressure bursts or tears open the small plate g separating this space from the external air, and thereby immediately opens the path for the external air to the interior of the fuse. Figs. 2 and 3 show a modified construction. -In this case the closing plate g is'not destroyed by the pressure of the existing gases of combustion, but the plunger a, which need not be bored, is soldered or otherwise fastened to the plate g. On the relative backward movement of the plunger due to the initial shock on firing the proj ectile, the small plate g will be taken with the'plungerbeing drawn out of or torn from its peripheral fastening and will thereby establish a free opening atkthe front end of klongitudinal air passage .e leads tothe com i l9c and the openings c in the cap into the hol --Qff ,Y f y f 41,637,964.

the hollowspace fnd consequently 'conamunication with the external air.

Fig. A2 shows Vthe position 'of vthe' parts Y. before'fii'inggundVi Fig. f3 just lfivfter firing. Y The invention :which :isileslrbd :above ai for a. time; fuse can naturally alsov be" ernnloyed in combination fuses with time and tinto "the fuse bodynd totheftisefoniposi 1 f2. ffiisejffor projeoti'les y'ri-firing ob- Lhinfnelosuregr and 'means ffor eutometieally br'ealinig 'sfeidt'lostlre whenv 'the proj'eCtile Vis fired in'moi'jlerto allow l'thelatino-spl'1ere to `penet'rzit'e' into the r.fuse composition, Vsaid eesily fand nlstantneously disengaged jby szi'id me'ansjwhen the l projectile is lfired. l'

BQA use'for projectiles' fior tiring at obhvin'g "an 'opening therein"l pr'oYidejsbWit-he n and having*an'airpassage cooperzting there- Whenth'e projectile isffired toi "fire the 'detonator so 'theft 'thefg'eses generated "by fthe deto.rv

fuse (composition.

ebtsitgret heights comprising -zi fuse body Having 'an opening therein; a thin plate se- `oired vin sid fopeninggf'n Afuse [composition in ysind 'fusebotlry';y a "det'on'ator 'In 'said body and a pl'n'gerfin'sa'id body 'adapted't'o canse the Altona'to'r 'tomfire when the projectile is eats greatfvleights"Comprising a fuseV body Y Y 4 aving'hn opening therein l,provided .with a ersdgs'o thtgthgeses gemmedfbythefdeto- ,Y

nat'or will breekthe thin plate in vorder to havingran opening-therein; a 4t said fuse body; agdetonator in said body;VV a

will A:breakthe.thin plate-in rorder to wllowfthe plunger liii' said lbody 'daplted to sca-use `'the l 'Y lQd'e'ton'ator tofirewhen the projectile -is lfired y so thatlltlieg'fnses generatedfby theI detontor o Y atmosphere y'tefp'eiri'et'rte 'tothe fiuse '.fcomposia. j.

tion'gfnd *si closing Toep having perfor-ations Y 6. '1i-:fge fer-.projectiles @ritenga-015-glthee t'i'nosplflere to penetrate tojthe'fruse 'compositiongand a fc'losinof (Cap @having perforai Y7.' A fuse -orcaproj jec'ts et ygreat 'heights comprising 'a ifuse `fbody hay-ing an'iopeni'a'ig therein; lla, "thin plate seg* b.

Cured said lopening; iaffuse composition in "seidA fns'efbofdy, said body 4havirrrlg fanfair eetifles 'for ffilring faftfobii passage therein eommtrnio-ting with VfsatidY fuse e'ompesitioniga Adetonetor in 1smid'body;` s Y a 'pltmge'r in saidb'ody adapted 2te cafuse lthe Idetonetorl to Yfire when the projectile is .tired f- 'so that the gas'e's'fgeneifated 'by the-'detonator ,'Wfll brezikrtli'ethin plate fin-order. to allow theV atmosphere "to penetretefto the .fuse'compesition; antifa closing o-a'p lievingfperforay n tions :t vthe sides fitted over seidfplmiger in fil?! order "to 'pr'ot'e'et it.

In testimony fvyhereoy 5I ihavefailiixed' ,y

signature.

'VALENTIN scHnfFim. 

